Funnel screen



. A. BLUNCK.

FUNNEL SCREEN Filed March 29. 1927 attaining:

Patented Nov. 22, 1927.

UNITED. STATES ROBERT A. BLUNCK, F GRAND MOUND', IOWA.

TUNNEL SCREEN.

Application filed March 29, 1927. Serial No. 179,30.

This invention relates to a screen and funnel for holding the same, one of the objects being to provide a structure of this character wherein the screen can be readily removed and replaced so that screens of different mesh can be used to meet the requirements of the liquid being strained and whereby the screens can be cleaned readily.

A further object is to provide a structure of this character which is simple. durable and compact and which will operate to maintain the screen firmly in position while in use.

With the foregoing and other objects n view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invent-ion.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings,

Figure 1 is a section through a funnel having the present improvements combined therewith.

Figure 2 is a section on line 2-2, Figure 1, the vent tube, and part of the screen fastoning means being shown in elevation.

Figure 3 is a plan View of the structure.

Figure 4 is a detail view of the screen.

Figure 5 is a detail view of the clamping gasket used in connection therewith.

Referring to the figures by characters of reference 1 designates a funnel provided with a vent tube 2 extending to the top thereof from a point close to the funnel outlet. Soldered or otherwise secured within the funnel is a supporting ledge 3 formed preferably from a pieceof sheet metal and which is so shaped as to fit snugly against the wall of the funnel and around the vent tube 2, this ledge being relatively narrow but of sufiicient width to support a disk 4 formed of screen material, preferably metal. This screen disk is cut away as at 5 to fit snugly about the vent tube 2.

A clamping ring 6, which is of substantially the same shape as the ledge 3 is fitted on the marginal portion of the screen disk 4 and close to the wall of the funnel. this ring having a peripheral recess 7 adapted to extend closely around, the vent tube 2.

A retaining ring formed preferably of spring wire has been indicated at 8, this ring being split at 9 and adapted to fit snugly upon the clamping ring 6 close to the wall of the funnel. At an intermediate point this retaining ring has a resilient yoke 10 which straddles the vent tube and is adapted to be snapped under a retaining lug 11 connected to the vent tube. When the yoke is in engagement with this lug it will be held under tension with the retaining ring hearing tightly upon the clamping ring 6. Thus the parts will be held together firmly. However by pressing downwardly or inwardly on the yoke 10 the same can be sprung out of engagement with the lug or car 11 so that the parts will thus be released and the retaining ring 8, the clamping ring 6 and the screen disk 4 can be easily removed. Obviously screen disks of different mesh can be used and as the parts are detachable these screen disks can be easily cleaned and replaced. Thus the parts can be adapted readily for use in connection with different kinds of fluid. The retaining ring 8 not only serves to hold the clamping ring 6 firmly upon the screen disk but also assistsin sealing the structure at the points of contact between the ring 6 and the wall of the funnel.

'VVhat is claimed is:

1. The combination with a funnel, a vent tube therein. and a ledge within the funnel and extending inwardly from the wall thereof and from the tube, of a screen disk seated at its periphery upon the ledge and straddling the vent tube, a resilient ring for clamping the marginal portion of the disk upon the ledge, and cooperating means upon the ring and funnel for holding said ring pressed yieldingly in clamping position, said means holding the ring detachably in place.

2. The combination with a funnel, a vent tube therein, and a ledge within the funnel and extending inwardly from the wall thereof and from the tube, of a screen disk mounted at its margin upon the ledge, a

clamping, ring bearing upon the margin of the disk, said ring and disk straddling the tube, a resilient retaining ring bearing upon the marginal portion of the clamping ring, and cooperating means carried by the retaining ring and the funnel for holding the retaining ring detaohably and yieldably in contact with the clamping ring.

3. The combination With a funnel, a vent tube therein, and a ledge Within the funnel and extending inwardly from the Wall thereof and from the tube, 01' a screen disk mounted at its margin upon the ledge, a clamping ring bearing upon the margin of the disk, said ring and disk straddling the tube, a resilient retaining ring bearing upon the marginal portion of the clamping ring,

and cooperating means carried by the re taining ring and the funnelfor holding the retaining ring detaohably and yieldably in Contact with the clamping ring, said means including a resilient yoke integral with the retaining ring and a retaining lug detachably engaged by the yoke.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature.

ROBERT BLUNCK. 

